#include<stdio.h>

void swap(int* i, int* j)
{
	int* temp = j;
	j = i;
	i = temp;
	printf("i=%d j=%d", *i, *j);
}

int main(void)
{

	int i = 10;
	int j = 20;
	swap(&i, &j);
	
	return 0;
}